function getDays(strDateStart,strDateEnd){
    var beginYear = strDateStart.substring(0,4);
   	var beginMonth =  strDateStart.substring(4,6);
   	var beginDay = strDateStart.substring(6,8);
   	var endYear = strDateEnd.substring(0,4);
   	var endMonth =  strDateEnd.substring(4,6);
   	var endDay = strDateEnd.substring(6,8);
   var strDateS = new Date(beginYear, beginMonth-1, beginDay);
   var strDateE = new Date(endYear, endMonth-1, endDay);
   iDays = parseInt(Math.abs(strDateS - strDateE ) / 1000 / 60 / 60 /24)//把相差的毫秒数转换为天数
   return iDays ;
 }


 function getMonth(strMonthStart,strMonthEnd) {
 	
 	var beginYear = parseInt(strMonthStart.substring(0,4));
 	var beginMonth = parseInt(strMonthStart.substring(4,6));
 	
 	var endYear = parseInt(strMonthEnd.substring(0,4));
 	var endMonth = parseInt(strMonthEnd.substring(4,6));
 	
 	var totalMonth = beginYear*12+beginMonth
 	var totalEndMonth = endYear*12+endMonth;
 	return totalEndMonth-totalMonth+1;
 }